Prototypes were chambered in 7.92×33mm Kurz and a pair of experimental French cartridges developed by Cartoucherie de Valence, 7.65×35mm and 7.5×38mm (the latter utilizing a partially aluminium bullet), before the design was finalized in the .30 Carbine chambering.

Due to economic considerations, with France fighting the Indochina War and being the second biggest NATO contributor, the weapon was cancelled.

Co-designer Ludwig Vorgrimler then left for Spain, where he further developed the concept into the CETME rifle, which in turn was developed into the Heckler & KochG3.